1310646641 has 4 divisors (see below), whose sum is σ = 1311916452. Its totient is φ = 1309376832.

The previous prime is 1310646611. The next prime is 1310646661. The reversal of 1310646641 is 1466460131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 718454416 + 592192225 = 26804^2 + 24335^2 .

It is a cyclic number.

It is not a de Polignac number, because 1310646641 - 2³⁰ = 236904817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1310646598 and 1310646607.

It is not an unprimeable number, because it can be changed into a prime (1310646611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 633356 + ... + 635421.

It is an arithmetic number, because the mean of its divisors is an integer number (327979113).

Almost surely, 2^1310646641 is an apocalyptic number.

It is an amenable number.

1310646641 is a deficient number, since it is larger than the sum of its proper divisors (1269811).

1310646641 is a wasteful number, since it uses less digits than its factorization.

1310646641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1269810.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 1310646641 is about 36202.8540449507. The cubic root of 1310646641 is about 1094.3641884796.

The spelling of 1310646641 in words is "one billion, three hundred ten million, six hundred forty-six thousand, six hundred forty-one".